var getFFVersion = navigator.userAgent.substring(navigator.userAgent.indexOf("Firefox")).split("/")[1]
//extra height in px to add to iframe in FireFox 1.0+ browsers 
var FFextraHeight = getFFVersion >= 0.1 ? 16 : 0
function dyniframesize(down) {
    var pTar = null;
    if (document.getElementById) {
        pTar = document.getElementById(down);
    }
    else {
        eval('pTar = ' + down + ';');
    }
    if (pTar && !window.opera) {
//begin resizing iframe 
        pTar.style.display = "block"

        if (pTar.contentDocument && pTar.contentDocument.body.offsetHeight) {
//ns6 syntax 
            pTar.height = pTar.contentDocument.body.offsetHeight + FFextraHeight + 100;
        }
        else if (pTar.Document && pTar.Document.body.scrollHeight) {
//ie5+ syntax 
            pTar.height = pTar.Document.body.scrollHeight;
        }
    }
}